Material-conveying mechanism



Sept 8, 1925. 1,553,033

K. DAVIS MATERIAL CONVEYING MECHAN-I SM Filed Jan. 21, 1920 9 Sheets-Sheet 1 INVE/V TOR v H mom I Sept. 8, 1925. 1,553,033

,I K. DAVIS I MATERIAL CONVEYING MECHANISM Filed Jan. 21, 1920 9 Sheets-Sheet 2 l/V VE IV TOR sqs't 8,1925". 1,553,033

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K. DAVIS MATERIAL CONVEYING MECHANISM '9 Sheets-Sheet 4 Filed Jan. 21, 1920 i I i I: I i F i 2 I i H A F u a A. W. mm: mw

Sept s, 1925. 1,553,033

K. DAVIS MATERIAL CONVEYING MECHANISM Filed Jan. 21, 1920 9 Sheets-Sheet 5 E mvnvmn I By 6 '7 3 "12m ept. 8, 1925.

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MATERIAL CONVEYING MECHANISM Filed Jan. 21, 1920 9 Sheets-Sheet 6 ATTOR EY Sept s, 1925. 1,553,033

K. DAVIS MATERIAL CONVEYING MECHANISM Filed Jan. 21, 1920 9 Sheets-Sheet 7 Sept. s, 1925. 1,553,033

K. DAVIS MATERIAL CONVEYING MECHANI SM Filed Jan. 21, 1920 S Sheet S-Sheet s INVENTOR M A770 EY Sept s, 1925. v 1,553,033

K. DAVIS MATERI AL CONVEYING MECHANI SM Filed Jan. 21, 1920 9 Sheets-Sheet 9 Patented Sept. 8, 1925.

* UNITED STATES KENNETH DAVIS, OF ST. BENEDICT, PENNSYLVANIA, ASSIGNOR 'IO REMBRANDT PATENT OFFICE.

IPEALE, OF NEW YORK, N. Y.

IATERIAL-CONVEYIN G MECHANISM.

Application filed January 21, 1820. Serial No. 352,928.

To all whom it may concern:

Be it known that I, KENNETH DAVIS, a citizen of the United States, residing at St. Benedict, Pennsylvania, have invented certain new and useful Improvements in Material-Conveying Mechanism, of which the following is a specification.

The invention relates to conveying mechanisms, and more particularly to a novel conveying mechanism for transporting loose material in bulk, and in certain features thereof, the invention relates to such a conveying mechanism operating on a slope or gradient.

Objects and advantages of the invention will beset forth in part hereinafter, and in part will be obvious herefrom, or may be learned through practice with the invention; said objects and advantages being realized and attained through the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a art hereof, illus-' trate one embodiment of t e invention, and together with the description, serve to ex-' plain the principles of the invention.

Of the drawings Fig. 1 is a general elevation of a mechanism constructed in accordance with the invention, and applied in an exemplary manner to conveying coal up a mine slope;

Fig. 2 is a fragmentary elevation, on a larger scale, of a part of the material conveyii ng mechanism shown in a general way in 1g. 1; r

Fig. 3 is a top planv view corresponding to Fig. 2;

Fig. 4 is a vertical, transverse section taken substantially on line 4 4 of Fig. 2;

Fig. 5 is a vertical, longitudinal section taken substantially on line 5-5"of Fig ii;

Figs. 6 and 7 are views similar to but with parts omitted, showing'the opera tionof the mechanism in conveyingmiute- Fig. 8 is an enlarged detail of one of. the devices for fastening the sections of the conveyor together:

Fig. 9 is an enlarged plan view of the actuating mechanism for the conveyor, said mechanism being shown in a general way in Fig. 1; I

Fig. 10 is a side elevation of the actuating mechanism shown in Fig. 9;

Fig. 11 is an elevation of different form of actuating mechanism for the conveyor;

Fig. 12 is a fragmentary plan view, on an enlarged scale of the automatic reversing mechanism for the actuating mechanism shown in Fig. 11;

Fig. 13' is a general elevation of a form V of "the conveyor for transporting material down grade;

Fig. 14 is a similar view to Fig. 13, but showing a somewhat different form of the mechanism 7 Fig. 15 1s avertical, transverse section, on an enlarged scale, taken on line 15-15 of Fi 14; p ig. 16 is an enlarged fragmentary detail, in elevation, of the construction shown in the central part of Fig. 14;

Fig. 17 is an elevation of a form of driving or actuating mechanism for the conveyors shown in Figs. 13 and 14;

Fig. 18 is an enlarged fragmentary end elevation of the mechanism shown in Fig.- 1 1 Fig.19 is an elevation of a different form of actnatin or driving mechanism for the conveyors s own in Figs. 13 and 14.; and

Fig. 20 is a fragmentary detail of the winding drum shown in Fi 18 and of the men; to avoid the employment and handling of cars, including the loading, handling, an especially the dum for immediatehan ling of the material'irof such material; to froing thereof; to provide res ective of variations in the volume or bul of material which is supplied at different times. I

In certain. aspects or a plications of the invention, it is designed or the conveyance of loose material or materials on a slope or adient. The conveyor in such'cases is divided longitudinally into two or more parts, and means are provided whereby the weight of a portion of the downwardly traveling material, that is, the material traveling downwardly with one art of the mechanism, is made to counter alance or. raise another part of the mechanism, which is traveling upwardly. Having in view the objects and conditions outlinedlabove, such counterbalancing shifts alternately from one portion of the material and mechanism to" another in succession, thereby effecting a or conveyor trough reciprocating to and fro, there being within the conduit or troughs aced apart members operating to permit t e material within the conduit or trough to travel therewith in one direction, but olding the material against movement with the conduit'or trough in the opposite direction. The conduit or conve or itself referably consists of a series 0 sections d attached together, the conveyor reci rocating to and fro along a guideway, wh preferably a track whereon pairs of wheels upon which the conduit sections are mounted gether the bottnn frames of the sections,

and these will be later described. The conrun.

The spaced apart members within the conveyor trough are preferably blades arranged across the trough, pivotally mounted in stationary position, and equally spaced apart, but swin able to rmit the above-described action 0 the bla e upon the conveyed material, the pivoted blades being preferably in an inclined position within t e trough. Also it is preferable to have the path of reciprocation of the conduit or conveyor trough somewhat for than the distance between the spec apart blades.

In the appl cation of the invention to conveying-materials u n a gradient or incline,

. in one aspect of t e invention the conduit or conveyor trough is counterbalanced, so that the work expended is substantially that required for the elevation of the material plus the relatively small amount of frictional loss. Where the mechanism is utilized for conveying the material downwardly on etachably' ich is an inclineor gradient, the counterbalance is not employed, as theinvention in its preferred orin provides, as alreadyexplained, for utilizing the wei ht or gravitational actionof one part of t e'descending mechanism and contained material in forwarding or advancing another nism, this action successively alternatin between two orniore difierent parts 0 the traveling mechanisms and descending material. 7 Referring nowindetail to the embodiment of the accompanyin I drawings:

Fig. 1 is a genera elevation, more or less dia ammatic, of theexemplary application of t e invention to conveying upwardly coal or-(pther loose material along a mine slope, an

Figs. 2 to 12 included are details of the construction and-operation of a mechanism such as is shown mFig. 1. Figs. 13 and 14 are elevations likewise partly dia ampart of the mechamatic, of the app ication of the invention to the conveyance of loose material down a adient or incline,"'and Figs. 15 to 20 are etailed views showing in an exemplary way illustrative emthe o eration of such a mechanism.

'. Re erring now to Fig. 1 and the abovementioned accompanying group of figures,

the conduit or conveyor trough is shown consisting of a plurality of sections 1, each section comprising vertical sides 2 and 3 and a bottom 4, the top and the ends of these conduit or conveyor sections being open. The sections are connected together by attachable and detachable devices, and as em bodied, hooks 6 are shownliaving, respectively,.pivot mountings 7, upon both sides of a conduit section at one end thereof, and hooking, respectively, over pins or hooks 8, fixed to the side walls of the adjacent end of the adjoining section. There are also preferably hooks for connecting toduit or conveyor trough sections are offset at one end, so that one endof each section will fit neatly within the adjacent end of the next ad oining section, as shown at 9 in The conveygr sections are preferably pro the cross reach 12 of the bottom frame of the next adjacent section. A locking pin 18 may be passed through the flange of the channel 12 to hold the hook 15 in position.

As stated, the conveyor or conduit reciprocates to and fro along the guideway, and there are preferably provided Wheels on each conveyor section running upon trackways. With this in view, and as embodied, each section is provided with two pairs of wheels and 21, each pair being mounted, respectively, on an axle 22, the axle passing through the frame members 13 and 14, and

preferably through bearing blocks 24 and 25 fixed within the channel beams. Track rails 26 and 27 are provided, which are shown of the usual T rail form, the wheels being likewise shown as the ordinary flanged track wheels.

The counterbalance may be of any convenient or standard form, and in Fig. 1 there isshown a counter-balancing Weight 30, connected to a cable 31 which is also connected to the upper end of the train of conveyor trough or conduit sections, andruns over one or more sheaves 32.

The embodied form of devices for effecting the progression or travel of the loose material, such as coal, along and within the conveyor, comprises a plurality of spaced apart blades 35, located within the conveyor or conduit, and disposed across it and substantially filling the cross section of the con duit with fair or easy clearance. The blades are regularly spaced apart, and are stationary considered longitudinally of the conveyor, but are pivotally mounted, that is, are swingable along the conduit. The blades 35 are preferably inclined, as shown in Figs. 1 and 5 whereby they will permit the loose, broken material lying in the conduit to pass therebeneath inone direction (toward the left in Figs. 1 and 5), but will hold the material against movement with the conduit in the opposite direction (to the right in Figs. 1 and 5). The blades35 are preferably provided with baflles 36 to. prevent the material piling -upwardly and back wardly over the blades. The various blades 35 are respectively mounted on a pair of arms 37 and 38 pivotally or swingably journaled on a cross rod 39. The rods 39 are supported in any suitable manner, and in Fig. 4 one rod 39 is shown with its ends resting in supporting journal brackets 40 and 41, which are fastened, respectively, upon posts 42 and 43, which may conveniently be a part of the mine timbers when the mechanism is installed in the mine. If desired any suitable stops 44 may be employed to prevent too great pressure of blades 35 against the conveyor bottom 4, and thereby causing unnecessary friction.

Suitable actuating means are provided for moving the conduit or conveyor train to and fro in its reciprocatory travel along the tracks, and as embodied, a cross rod is fixed to the bottom frame of one of the conduit sections. Pivotally mounted thereon is a connecting rod 51, the other end of such connecting rod being pivotally mounted upon a cross rod 52. The cross rod 52 is connected at its ends to two endless sprocket chains 53 and 54. The sprocket chains 53 and 54 run respectively over idler sprocket wheels 55 and 56, and also ever driven sprocket wheels 57 and 58. Fixed on the. shaft 59 of sprocket wheel 57 is a gear 60. Fixedon the shaft 61 of sprocket wheel 58 is a gear 63. The gears and 63 mesh respectively with pinions .64 and 65 which are fixed on a shaft 66. Fixed on the shaft 66 is a gear 67, and meshing with the gear 67 is a pinion 68, which is fixed on the shaft of a motor 69. The bearings for the sprocket wheels are on the outside to give clearness for cross rod 52. Suitable guides for the sprocket chains to prevent sagging, or other deflection may be provided if desired in the usual manner.

In the illustrative embodiment of Fig. 1, showing the conveyance of material up a mine slope or other incline, a receiving chute 70 is shown, into which is emptied the 1na-' terial delivered at the upper end of the conduit. The material passes from thence into a car 71. It will be understood that any usual weighing devices, screening and picking devices, or other apparatus -or mechanism may be employed at this point, but the description and showing thereof are unnecessary, as they are well known. I At the bottom end of the conduit a car 72 is shown being dumped into the conduit, and at .73 another conduit system is shown conven-- tionally as emptying into the inclined conduit.

The manner of operation of the mechanism just described is briefly as follows (the further details thereof being clearly understangiable from.- the preceding description a The motor 69 drives the sprocket chains 53 and 54, and through the connection rod 51 the train of-conduit sections 1 is reciprocated to and fro on the tracks 26 and 27.- The blades'35 will swing'upwardly', and; permit the loose material lying in the conduit to travel with the conduit and beneath the blades during the travel of the conduit to the left in Figs. 1, 5 and 7 and as shown in Fig. 5. On the travel of the conduit in the opposite direction the blades hold the material from traveling backwardly with the conduit.

The distance or spacing apart of the blades and the distance or length of the longitudinal reciprocatory travel of the conduit are so related or relatively proportioned that the mass of material behind one blade is left in such position that during the reverse travel of the conduit (to the left in Figs. 5. 6 and 7) said mass of material is carried forward under the next blade to a point beyond said next-blade. Thus said blade is With the mechanism such as described and shown, the material is conveyed up the. slope in bulk irrespective of fluctuations in the time of its arrival at the slope bottom,

and all handling of cars on the slope and at the slope head is avoided. Furthermore coal may be simultaneously delivered to the conveyor from a plurality of levels, or from a plurality of sides of one level simultaneously, and without being interfered with by such delivery from other levels. Also there is effected the savin of time necessary in making up slope trams at the top and bottom, and the necessity of signaling from the bottom to the engine room at the top is avoided as well as avoiding many other disadvantages incident to the usual installations. There is also avoidance of the length limitations and excessive cost and Wear of conveyor belt hoisting installations such as are sometimes used for work of this kind.

In Figs. 11 and 12 a som hat different form of driving mechanism f the reciprocating conduit is shown. Inaid form a cross rod 78 is fixed to the bottom frame reaches 13 and 14 of one of the coinveyor sections. Fixed to the rod 78 is an endless sprocket chain 79 running over idler sprockets 80 and 81, and also over a driven sprocket -82. Sprockets 80 and '81 are journaled in a suitable manner not shown.

' Sprocket wheel 82 is mounted in journal bearings 83 and 84:, and fixed to the shaftof sprocket wheel 82 is a bevel gear 85;-

A reversible drive for bevel gear 85, as

' embodied, comprises two bevel gears 86 and 87, fixed to a shaft 88, and slidable alternativelyinto and out of engagement with the bevel gear 85. Shaft 88 is slidable in bearings 89, 91 and 92. Splined on shaft 88 is a gear wheel 93, with which wheel meshes a pinion 94 fixed on the shaft of a motor 95. Thus gear wheel 93 and shaft 88 and bevel pinions 86 and 87 rotate together, but shaft 88 and bevel pinions 86 and 87 are slidable relatively to gear wheel 93.

The embodied means for sliding shaft 88 to and fro from time to time and thereby reversing the drive on the conduit, comprises two arms 96 and 97 fixed at proper points on the conduit and adapted respectively to engage the opposite ends of the shaft 88 and thus to move it longitudinally.

, As the conduit approaches one end of its path of travel, the arm 96 will slide the shaft 88 into the position shown in Fig. 12,

and bevel gear 86 will drive sprocket wheel 82 and sprocket chain 79 in one direction, thereby moving the conduit in one direction. lVhen the opposite end of the path of travel of the conduit has been reached arm 97 will engage the end of shaft 88, slide it longitudinally and thereby move bevel gear 86 jxout of mesh with gear 85, and will move bevel gear 87 into mesh with bevel gear 85. This willreverse the movement of sprocket wheel 82and sprocket chain 79, and will thereby travel the conduit 1 in the opposite direction.

Means are provided for holding the shaft 88 at either end of its travel but permitting it. to be shifted from one end to the other as just described. As embodied, a bevel roller 98 is loosely and rotatably mounted upon shaft .88 between collars 99 and 100 fixed to the shaft. Bearing on the roller 98 is a pointed plunger 101, which is mounted on a rod 102. Rod 102 is longitudinally slidable in supports 103 and 10 1, and is yieldingly impelled against the roller 98 by a coiled spring 105. When shaft 88 is pushed longitudinally, plunger 101 will yield, and when roller 98 has passed, the plunger will lock on the other side thereof until the shaft is again moved by one of the arms 96 or 97. Thus accidental play of the shaft is prevented, while it is free to perform its regularmovement.

In Fig. 13 is shown in elevation and somewhat diagrammatically an embodiment of the invention adapted to convey material downwardly on a gradient, or incline, and in connection therewith mechanism and arrangements whereby a portion of the material in one part of the mechanism will act by its weight to perform work on another portion of the mechanism and vice versa in the other direction. In Fig. 13 the conduit is shown in two parts 110 and 111, the part -110 moving upwardly when the part 111 is weight of both the mechanism and the material in one section is employed against the work of merely raising the mechanism in the other section, while the material therein is held at rest by the blades 35, to effect the travel between the material and theconduit as already described. I

In Fig. 14 a somewhat different form of mechanism, butoperating very much in the same manner, is provided. In this particular form, however, the two parts 112 and 113 (corresponding to the parts 110 and/111, already described so far as general operation is concerned) have their adjacent ends telescoping. There is thus secured the working of the weight of the descending mechanism and material of one part 112 or 113 against the raising of the mechanism of the other part. The mechanical saving or economy in an actual installation of large size amounts to nearly ninety per cent of the power reuired where there is not this cooperation ust described. I

In Figs. 15 and 16 are shown certain details of the telescoping ends of the conve or parts 112 and 113. As embodied, the ast regular or standard section ofthe art 112 is provided with an extension 115, 0 similar shape and eneral dimensions, but fitting slidably wit in the'uppermost or end section 116 of the part 113 of the conduit. The section 115 will be slightly greater in length than the total distance of separation of the two conduit parts 112 and 113 when they are farthest apart. I

To ease the action between the parts, section 115 is preferably supported so as to have close clearance within the section 116.

. As provided, the upper edge of each side wall of the section 116 is turned over as shown at 118, and maybe provlded with an internal reinforcing strip 119, to make a rigid trackway or sliding guide and support for the section 115. The upper side edges of the section 115 extend above and over the top edges 118 of the sides of the section 116, and these side top edges of section 115 are bent or arched, as shown at 120, to inclose and to provide journals for a series of rollers 121, which rollers run on the edges 1180f section 116. The intles of the rollers 121 ma have bearing locks- 122 and 123 fixed to t walls of the section 115 as shown in Fig. 15. If desired also a supporting roller 124 may be provided be neath the section 115. i

As the parts 112 and 113 move toward and from each other, the section 115 will be supported by the series of rollers 121- running on the edges 118 of section 116, at

either side, the rollers running along the top edges 118 of the sidewalls of section 116 as upon a track. The action of the descendin loose material in one of the parts 112 an 113 in assisting to raise or move upwardly the mechanism of the other com veyor part 112 or 113 while the material is at resttherein has already been described in connection. with Fig. 13.

In Fig. 17 is shown one form of.-mechanism for moving the two, conduit parts as'shown in Figs. 13 and 14 in opposite directions. As embodied, a cross rod 130 is fixed to one of the bottom frames of the con: veyor part 113, and a cross rod 132 is fixed to a bottom frame 133 of the part 112 of the conduit system. Cross rod 130 is pivotally connected b a connectin rod 134 to a'wrist pin 135 xed to an en less s rocket chain 136. Cross rod 132 is pivotal y conrest b 157 may 144 is a'pinion 145, which is fixed on the shaft of a motor 146. Bearing and guidin plates 147 and 148 serve to hold the chain 136 to its path. By the mechanism just described it will be seen that the conduit parts 110 and 111, or conduit parts 112 and 113,

' are drawn first towards each other and then awa from each other along their pathway in t e manner and with the eifect and for the purpose already described. That is, in the escending part, say part 113, the material and conveyor mechanism are-travelmg downwardly together, whilein the ascendmg part, which in this case 'would be part 112, the mechanism alone is, ascending, while the material is held against upward movement bv the blades 35. Thus the weight of the material traveling downwardly in part 113 is utilized to reduce the work of raisingthe mechanism of part 112 while the material in part 112 is held at the blades.

In igs. 19 and 20 is shown a different form of driving mechanism for the conduit parts 110 and 111 or conduit parts 112 and '113. In said embodiment, attached to the cross rods. 130 and 132 already described is a cable 155, this cable passing over a reversing' sheave 156. Cable 155 is wound around a drum 157 so as to wind on and pay oil equally and in either direction, dependent upon the rotation of the drum. The shaft of drum 157 is journaled in bearings 158 and 159. Fixed to the shaft of drum 157 is a bevel pinion 85, corresponding to the bevel pinion 86 alread described. The reversing mechanism used or the drum for the sprocket wheel 82 12 and-alread described, certain parts thereof being shown in Fig. 20 and being numbered the same as the corresponding parts in Fig. 12.

shown in Fig.

be substantially the same as that.

In the general conveyor mechanism it will 7 I be understood-that the conveyor units bein attachable to and detachable from eac other, and the blades being separately mounted. if desired, that the oonve or system is easil and rapidly extensi lo and contractible [y units.

In Fig. 21 the drive of Figs. 9 and 10 is shown applied to operating the balanced conveyors, such as are shown in Fig. 14. This drive is an alternative for the drive shown in Fig. 17. The connectingrod 51 operates one of the conduits and a cable 162 connects from the other conduit to cross-rod 52 of connecting rod 51, passing around a sheave 163 to efiect the reversal of motion. This provides a very evenly balanced drive.

The invention in its broader aspects is not limited to the specific mechanisms shown and described, but departures may be made therefrom within the scope of the accompanying claims, without departing from the principles of the invention and without sacrificing its'chief advantages.

What I claim is: p I

1. A conveyor for loose material including in combination a reciprocable conveying conduit, another reciprocable conveying conduit in alinement therewith and adaptedto travel in the opposite direction therefrom,

' the reciprocations of each of the conveying units being in a rectilinear path, and a telescoping'section between the two conduits ary, inclined material-engaging blades 10-.

cated within the conveyors.

3. A conveyor for loose material including in combination a reciprocable conveying conduit, another reciprocable conveying conduit in alinement therewith and adapted to travel in the opposite direction therefrom, the reci rocations of each of the conveying units being in a rectilinear path, and a telescoping section between the two conduits const1- tuting a continuous passa e for the conveyed material as the two cond uits approach and recede from each other, said telescoping section being connected to one of said conduits to reciprocate therewith, and means for reciprocating the conduits in a rectilinear path. 5

4, A conveyor for loose material including in combination a reciprocable conveying conduit, another reciprocable conveying conduit in alinement therewith and adapted to travel in the opposite direction therefrom,

the reciprocations of each of the conveying units being in a rectilinear path, and a telescoping section between the two conduits constituting a continuous passage for the conve ed material as the two conduits approac and ,reccde from each other, said telesco in'g section being connectedxto one of sai conduits to reciprocate'therewith and being movablysu ported .ufpon the other of said conduits, an means or reciprocating the conduits in a rectilinear path.

. 5 A conveyorffor loose material including in combinationareciprocable conveying conduit, another rec'iprocable conveying conduit in'alinement therewith and adapted to travel in the opposite direction therefrom, and a telescoping section between the two conduitsjconstitutin'g a continuous passage for thefconveyed-material as the two conduits approach andfrecede fromea'ch other, said telescoping section being connected to one of said conduits? to reciprocate therewith and having a rolling supporton the other'of said condu ts, and means-for reciprocating the conduits.

' 6'. in combination a reciprocable-conveying conduit, another reciprocable'conveying conduit in alinement therewith'and adapted to travel in the 'o posite direction therefrom, both said con nits having rectilinear movement only, and a telescoping section between the two conduits constituting a continuous passage for the conveyed material as the .two conduits ap roach and recede from each other, thete escoping section beingmovably A conveyor for-loose material including supported, on the upper longitudinal edges of one of the conduits, and means -for reciprocating the conduits.

7 A conveyor for loosematerialincludingz in combination a reciprocable conveying coni a duit, another reciprocable conveying conduit in alinement therewith and. adapted to travel in the opposite direction therefrom, both said conduits havin rectilinear movement only, and a telescoping section between the two conduits constituting a continuous passage for the conveyed material as the two conduits approach and recede from each other,.means for reciprocating the conduits, I

nected to one of said conduits to reci rocate therewith, and being mounted for rol mg engagement along the upper longitudinal edges of the other conduit, and means for reciprocatinithe conduits. 9. conveyor for loose material including trackway, another convelying conduit mounted on wheels rolling a ong-s'aid trackway,

means for reciprocating said two conduits simultaneously in opposite directions along f the trackway, and a telescoping section com tinuously joining said sectlons to mainta n the continuity of the conveyor as the two conduits alternately approach and de from eachother.

10. A conveyorfor loose material- 'including in combination a trackway, a conve ling conduit mounted on wheels rolling a ongi ,said trackway,

mounted on wheels rolling along said trackway, means for reciprocating said two con another conveying conduit duits simultaneously in opposite directions and a telescoping sec-'- along the trackwa tion continuously joining said sectionsto maintain thecontinuity of the conve eras-- the two conduits alternatel approac and recede from each other, an stationar- ,inclined, pivoted blades within each 0 said conduits. I

11. A conveyor for loose material including in combination a trackway, a conveying conduit mounted onwheels rolling a ong said trackway, another conveying conduit mounted on wheels rolling along .said'trackway, means for reciprocating said two con duits simultaneously in opposite directions along the trackway,

continuously joining said sections to maintain the continuity of the conveyor as the two conduits alternately approach and re- 12. A conveyor for loose material including in combination a trackway, a conduit reciprocable along said trackway and consisting of a plurality of units, said units havin frames underneath, and having bottoms and sides but no ends mounted on the frame,

wheels attached to the frame and rolling upon the track, and inclined materialjengaging blades located between the sides of the conduit.

13. A conveyor for loose material including m combination a trackway, a conduit reciprocable along said trackwa and consisting of a plurality of units, sai units having frames underneath, and having bottoms and sides but no ends mounted on the frame,

. wheels attached to the frame and rollinupon the track, means for attaching the frames of contiguous units to ether, and inclined material engaging blag tween the sides of the conduit.

14. A conveyor for loose material including in combination a trackway, a conduit reciprocable along said trackway and consisting of a plurality ofv units, said units having frames underneath, and having bottrackway, and inclined material I ing n, combination two inclined common means for longitudinally rec1pro du'its simultaneously and a telescopingsec tion fixed to one of said conduits and slidably supported by the other of said conduits, f

taneously in opposite directions conduit.

es located berolling upon the track, means for attaching thevframes of contiguous units to ether, means attached to one of said unit ames or reciprocating the conduit along the engaging blades located between the sides of the conduit.

15. Aconveyor'for loose material includconduits,

eating said conduits simultaneously in oppoj site directions and means forpreventing the material in the ascending conduit moving vulmrardly with the condult.

16. A conveyor for loose material includ ing-in combination two inclined conduits,

one arranged longitudinally above the other,

the upper conduit emptying the loose mate rial into the lower con uit, common means for longitudinally reciprocating said conand means forpreventin'g the material in the ascendin conduit moving upwardly with the con uit..

17. A conveyor, for loose material including in combination two inclined conduits, the two conduits being alinement, the upper conduit empt in into the lower conduit, common means fbr longitudinally reciprocating said conduits simulfor preventing the material in the ascending conduit moving upwardly with the 18. A conveyor for loose material includ ing in combination two inclined conduits, one arranged lon itudinally-above the other, common means %or longitudinally reciproeating said conduits simultaneously in opposite directions and means for preventing the 7 material in the ascending upwardly with the conduit.

19. A conveyor for loose material including in combination two inclined conduits, the two condults being longitudinally in alinement, common means for longitudinally reciprocating said conduits simultaneously in opposite directions and means for preventing the material in the ascendin conduit moving upwardly with the conduit.

20. A conveyer for loose materials, comprising in combination, two telescoping trough sections, means for reciprocating the two trough sections in opposite directions in a rectilinear path, and a plurality of material engagin blades positioned between the side walls 0 the trough, each blade being pivoted on a pivot which is fixed with re: spect to the trough, the distance between a pair of adjacent pivots being less than the amplitude of the movement of the trough sections.

21. A conveyer for loose materials, comin opposite directions longitudinally in and means conduit moving prising in combination two telescoping trough sections, one section being provided with rollers rolling on the upper longitudinal edges of the other section, means for reciprocating the two trough sections in op osite directions in a rectilinear path, an a plurality of material engaging blades positioned between the side walls of the trough, each blade being pivoted on a pivot which is the distance between a pair of adjacent pivots being less than the amplitude of the movement of the trough sections.

In testimony whereof, I have signed my name to this specification.

KENNETH DAVIS.

fixed with respect to 'the trough, 10 

